Mimi Zohar 143f450c6c ima: detect changes to the backing overlay file ... commit b836c4d29f2744200b2af41e14bf50758dddc818 upstream. Commit 18b44bc5a6 ("ovl: Always reevaluate the file signature for IMA") forced signature re-evaulation on every file access. Instead of always re-evaluating the file's integrity, detect a change to the backing file, by comparing the cached file metadata with the backing file's metadata. Verifying just the i_version has not changed is insufficient. In addition save and compare the i_ino and s_dev as well. Reviewed-by: Amir Goldstein <amir73il@gmail.com> Tested-by: Eric Snowberg <eric.snowberg@oracle.com> Tested-by: Raul E Rangel <rrangel@chromium.org> Cc: stable@vger.kernel.org Signed-off-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2023-11-28 17:07:12 +00:00
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Kconfig	…
Makefile	…
copy_up.c	overlayfs: set ctime when setting mtime and atime	2023-10-25 12:03:09 +02:00
dir.c	…
export.c	…
file.c	ovl: fix incorrect fdput() on aio completion	2023-09-23 11:11:10 +02:00
inode.c	ovl: fix null pointer dereference in ovl_permission()	2023-08-03 10:23:47 +02:00
namei.c	…
overlayfs.h	ovl: let helper ovl_i_path_real() return the realinode	2023-07-23 13:49:28 +02:00
ovl_entry.h	ovl: check type and offset of struct vfsmount in ovl_entry	2023-07-27 08:50:32 +02:00
readdir.c	…
super.c	ima: detect changes to the backing overlay file	2023-11-28 17:07:12 +00:00
util.c	ovl: let helper ovl_i_path_real() return the realinode	2023-07-23 13:49:28 +02:00